断层上下盘采动活化突水数值模拟研究

 摘 要：为了研究断层上下盘开采活动对断层活化突水的影响规律，本文利用数值计算软件FLAC3d，结合赵固二矿F109正断层的实际地质条件，建立数值计算模型。研究了工作面分别布置于断层上下盘时周边围岩应力场与渗流场的耦合作用，以及周边岩体应力和位移的变化情况。模拟结果表明，断层活化突水是塑性破坏场与渗流场相互耦合作用的过程；当工作面布置在断层上盘时，开采过程中底板位移量较大，断层上盘承受的垂向应力较断层下盘要大。断层上下盘开采活动对断层活化影响作用不同，工作面布置于断层下盘开采更安全。

Numerical Simulation of activation and water inrush due to underground excavation in hangingwalls and footwalls of faults

Abstract:In order to study the law of Water inrush due to underground excavation in hangingwalls and footwalls of faults,FLAC3d was used to establish numerical model,combined with Zhaogu Secong Mine’s Normal fault F109 ‘s actual geological conditions. This article studies the coupling of the Seepage and Plastic deformation fields and the changes of the Surrounding rock stress and displacement.The simulation results show that the fault activation and water inrush is a progress that the Seepage and Plastic deformation fields couple Mutually. when the working Face was arranged in the hanging wall, the displacement of the floor is larger and so is the Vertical stress beared by the hanging wall. The hanging wall and the foot wall have different influence on the fault activation, and it is safer to arranged the working face in the hanging wall of the fault.